Alarm speed-indicator



(No Model.)

G. J. 'LANGENBAGH.

ALARM SPEED INDICATOR.

Patented July- 25 1882.

wizfpgyMaf N. PETERS. Fhflln-Lilhugnphar. Washinglon. D,C.

PATENT OF ICE- CHARLES J. LANGENBAOH,

OF DOROHESTER, IOWA.

. ALARM SPEED-INDICATOR.

SPECIFICATION forming part of Letters Patent No. 261,732, dated July 25, 1882.

Application filed April 3, 1882. (No model.)

To all whom it may concern Be it known that I, CHARLES J. LANGEN- BAOH, of Dorchester, in the county of Allamakee and State of Iowa,have inventeda new and useful Improvement in Alarm Speed-Indicators, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, making a part of this specification, in which the figure is a perspective view of an'alarm-indicator with my improvements attached.

The object of my invention is to provide an alarm-indicator toindicate fast or slow motion by two different sounds; and it consists of certain details of construction and combination of devices, as hereinafter described .and claimed. a

To enable others skilled in the art to make and use my invention, 1 will proceed to describe the exact manner in which I have carried it out.

In the drawing, A represents a board or the base of the indicator.

' B B are two arms secured to the board by the screws 1) or any other convenient means. These arms furnish hearings in their outer ends for the vertical shaft 0, the lower arm being provided with a step-bearing to keep the shaft in position. The upper arm may be provided with an adjustable bearing, so that the shaft can be removed when desired. The shaft is driven by the pulley D, connected by means of a belt with the driving-power. A

On the vertical shaft 0 is attached the ad- 3 5 justable block E, on one end of which is so;

cured a ball, I*. The opposite end is slotted vertically to receive the pivoted arm G, carryin g the ball g. Below the slotted end of the block E, I secure the plate H, which furnishes 40 a bearing for the adj usting-screw e, by which the fall of the arm G is determined and controlled. As the shaft (J is revolved the ball 9 is raised by centrifugal force, and the degree I of rise or fall depends upon the velocity at which the shaft is moved, thus actin ordinary steam-governor.

On the base A of the indicator I secure the two steel springs M M, on the ends of which are the be1l-metal plates h h. These springs are secured in position by screw-bolts I, between which is a block,.J, slotted in the cen; ter to afford proper adj ustability to the springs, and is secured by the thumb-screw K to the base A, as shown in the drawing.

The operation of my alarm speed-indicator is as follows: When the indicator is in posig like the 5 tion the desired speed is determined and the springs H H adjusted so as to allow the ball g in its revolution to pass freely between them, If the speed should slacken too much, the ball giwould necessarily revolve on a lower plane 21nd come in contact with the lower spring and trike an alarm. It the speed should increase beyond a desired velocity, the ball 9 *would necessarily be thrown up until it would come in contact with the upper spring and strike the alarm. .The two springs are so tempered as to yield very different sounds, so that the person in charge can readily tell whether the speed is toolow or too high. It is evident that bells may be placed on the ends of the springs without departing from the spirit of my invention.

Having thus explained my invention, what I claim as new, and desire to secure by Letters Patent, isp In an alarm speed-indicator, the revolving spindle (l, swinging arm G, and revolving ball 9, in combination with the sounding-springs H H, all constructed to operate substantially as and for the purpose set forth.

CHARLES J. LANGENBACH. 

